99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<ruby id="numhv"><small id="numhv"><sup id="numhv"></sup></small></ruby>

單項(xiàng)選擇題

Cooling of engine is achieved by circulation a cooling liquid around internal passages within the （）.

A.boiler
B.heater
C.engine
D.cooler

你可能感興趣的試題

單項(xiàng)選擇題

Cooling enables the engine metals （） their mechanical properties.

A.to retain
B.to remain
C.to maintenance
D.to have

單項(xiàng)選擇題

Constant cooling the various components of diesel engine has a number of functions except for （）.

A.good lubrication
B.low thermal stress
C.good mechanical properties
D.acid corrosion

<dd id="xyl05"></dd>

<pre id="xyl05"><acronym id="xyl05"></acronym></pre>

<ruby id="xyl05"><output id="xyl05"></output></ruby><pre id="xyl05"><strong id="xyl05"></strong></pre>